Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

CHECK MALFUNCTION
Is this malfunction detected only while driving in reverse?

Yes or No
1. Yes: CHECK A/T PNP SWITCH "R" POSITION.
2. No: GO TO 2.
CHECK OTHER MALFUNCTION
Are other malfunctions also detected by self-diagnosis and CONSULT-II? Refer to TROUBLE DIAGNOSIS WITHOUT CONSULT-II , TROUBLE DIAGNOSIS WITH CONSULT-II .

Yes or No
1. Yes: CHECK FOR OTHER MALFUNCTIONS.
  (When other malfunctions are eliminated, clutch pressure switch malfunction display may disappear.)
2. No: GO TO 3.
CHECK 2-4WD SHIFT SOLENOID VALVE AND 4WD SHIFT SWITCH CIRCUITS
Check 2-4WD shift solenoid valve and 4WD shift switch circuits.

OK or NG
1. OK: GO TO 4.
2. NG: Check, repair or replace faulty parts.
CHECK INPUT SIGNAL
1. WITH CONSULT-II: GO TO 5.
2. WITHOUT CONSULT-II: GO TO 6.
CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch to "ON" position.
2. Select "ECU INPUT SIGNALS" in Data Monitor.
3. Read out ON/OFF status of "CL PRES SW".
  
  Fig 1: Identifying Clutch Pressure Switch Operation
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: CONSULT-II - Data Monitor Display
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 7.
2. NG: Check the following.
  - Continuity between transfer control unit and transfer terminal cord assembly sub-harness connector
  - Transfer sub-harness
  - Clutch pressure switch Refer to 4WD SOLENOID VALVE, CLUTCH PRESSURE SWITCH AND LINE PRESSURE SWITCH ", "COMPONENT INSPECTION".
CHECK INPUT SIGNAL
Without CONSULT-II
1. Turn ignition switch to "ON" position and set 4WD shift switch to "4H" position.
2. Check voltage between transfer control unit harness connector terminal 34 and body ground.
  When 4WD shift switch is in "2WD": Battery voltage should exist. When 4WD shift switch is in "AUTO" or "4H" and A/T selector lever is in "D": "Wait" operating: Battery voltage should exist. "Wait" not operating: Approx. 0 volts should exist.
  
  Fig 3: Checking Voltage Between Transfer Control Unit Harness Connector Terminal And Body Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 4: Moving A/T Selector To P Position
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 7.
2. NG: Check the following.
  - Continuity between transfer control unit and transfer terminal cord assembly sub-harness connector
  - Transfer sub-harness
  - Clutch pressure switch
    Refer to 4WD SOLENOID VALVE, CLUTCH PRESSURE SWITCH AND LINE PRESSURE SWITCH ", "COMPONENT INSPECTION".
PERFORM SELF-DIAGNOSIS AGAIN
1. Check hydraulic parts.
2. After driving for a while, perform self-diagnosis again. Refer to "TROUBLE DIAGNOSIS WITHOUT CONSULT-II ".
OK or NG
1. OK: INSPECTION END
2. NG:
  1. Perform transfer control unit input/output signal inspection. Refer to "TRANSFER CONTROL UNIT INSPECTION TABLE ".
  2. If NG, recheck transfer control unit pin terminals for damage or loose connection with harness connector.